html,
body {
    background-color: rgb(218, 216, 216);
    width: 100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
}

.bm-container {
    position:fixed;
    right: 0;
    bottom: 0;
    width: 300px;
    height: 300px;
    padding: 20px;
    background-color: #fafafa;
}